import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:go_router/go_router.dart';
import 'dart:math' as math;

import 'custom_app_text_field.dart';
import 'form_field_wrapper.dart';
import '../models/card_assets.dart';
import '../config/display_config.dart';

/// Modèle de données pour le formulaire
class PersonalInfoData {
  String firstName;
  String lastName;
  String phone;
  String email;
  String address;
  String postalCode;
  String city;

  PersonalInfoData({
    this.firstName = '',
    this.lastName = '',
    this.phone = '',
    this.email = '',
    this.address = '',
    this.postalCode = '',
    this.city = '',
  });
}

/// Widget générique pour les formulaires d'informations personnelles
/// Supporte mode éditable et readonly, responsive mobile/desktop
class PersonalInfoFormScreen extends StatefulWidget {
  final DisplayMode mode; // editable ou readonly
  final String stepText; // Ex: "Étape 1/5"
  final String title; // Ex: "Informations du Parent Principal"
  final CardColorHorizontal cardColor;
  final PersonalInfoData initialData;
  final Function(PersonalInfoData data, {bool? hasSecondPerson, bool? sameAddress}) onSubmit;
  final String previousRoute;
  
  // Options spécifiques pour Parent 2
  final bool showSecondPersonToggle; // Afficher "Il y a un 2ème parent"
  final bool? initialHasSecondPerson;
  final bool showSameAddressCheckbox; // Afficher "Même adresse que parent 1"
  final bool? initialSameAddress;
  final PersonalInfoData? referenceAddressData; // Pour pré-remplir si "même adresse"

  const PersonalInfoFormScreen({
    super.key,
    this.mode = DisplayMode.editable,
    required this.stepText,
    required this.title,
    required this.cardColor,
    required this.initialData,
    required this.onSubmit,
    required this.previousRoute,
    this.showSecondPersonToggle = false,
    this.initialHasSecondPerson,
    this.showSameAddressCheckbox = false,
    this.initialSameAddress,
    this.referenceAddressData,
  });

  @override
  State<PersonalInfoFormScreen> createState() => _PersonalInfoFormScreenState();
}

class _PersonalInfoFormScreenState extends State<PersonalInfoFormScreen> {
  final _formKey = GlobalKey<FormState>();
  late TextEditingController _lastNameController;
  late TextEditingController _firstNameController;
  late TextEditingController _phoneController;
  late TextEditingController _emailController;
  late TextEditingController _addressController;
  late TextEditingController _postalCodeController;
  late TextEditingController _cityController;
  
  bool _hasSecondPerson = false;
  bool _sameAddress = false;
  bool _fieldsEnabled = true;

  @override
  void initState() {
    super.initState();
    _lastNameController = TextEditingController(text: widget.initialData.lastName);
    _firstNameController = TextEditingController(text: widget.initialData.firstName);
    _phoneController = TextEditingController(text: widget.initialData.phone);
    _emailController = TextEditingController(text: widget.initialData.email);
    _addressController = TextEditingController(text: widget.initialData.address);
    _postalCodeController = TextEditingController(text: widget.initialData.postalCode);
    _cityController = TextEditingController(text: widget.initialData.city);
    
    if (widget.showSecondPersonToggle) {
      _hasSecondPerson = widget.initialHasSecondPerson ?? true;
      _fieldsEnabled = _hasSecondPerson;
    }
    
    if (widget.showSameAddressCheckbox) {
      _sameAddress = widget.initialSameAddress ?? false;
      _updateAddressFields();
    }
  }

  @override
  void dispose() {
    _lastNameController.dispose();
    _firstNameController.dispose();
    _phoneController.dispose();
    _emailController.dispose();
    _addressController.dispose();
    _postalCodeController.dispose();
    _cityController.dispose();
    super.dispose();
  }

  void _updateAddressFields() {
    if (_sameAddress && widget.referenceAddressData != null) {
      _addressController.text = widget.referenceAddressData!.address;
      _postalCodeController.text = widget.referenceAddressData!.postalCode;
      _cityController.text = widget.referenceAddressData!.city;
    }
  }

  void _handleSubmit() {
    if (widget.mode == DisplayMode.readonly || _formKey.currentState!.validate()) {
      final data = PersonalInfoData(
        firstName: _firstNameController.text,
        lastName: _lastNameController.text,
        phone: _phoneController.text,
        email: _emailController.text,
        address: _addressController.text,
        postalCode: _postalCodeController.text,
        city: _cityController.text,
      );
      
      widget.onSubmit(
        data,
        hasSecondPerson: widget.showSecondPersonToggle ? _hasSecondPerson : null,
        sameAddress: widget.showSameAddressCheckbox ? _sameAddress : null,
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final screenSize = MediaQuery.of(context).size;
    final config = DisplayConfig.fromContext(context, mode: widget.mode);

    return Scaffold(
      body: Stack(
        children: [
          Positioned.fill(
            child: Image.asset('assets/images/paper2.png', fit: BoxFit.cover, repeat: ImageRepeat.repeat),
          ),
          Center(
            child: SingleChildScrollView(
              padding: const EdgeInsets.symmetric(vertical: 40.0),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text(widget.stepText, style: GoogleFonts.merienda(fontSize: 16, color: Colors.black54)),
                  const SizedBox(height: 10),
                  Text(
                    widget.title,
                    style: GoogleFonts.merienda(
                      fontSize: 24,
                      fontWeight: FontWeight.bold,
                      color: Colors.black87,
                    ),
                    textAlign: TextAlign.center,
                  ),
                  const SizedBox(height: 30),
                  Container(
                    width: config.isMobile ? screenSize.width * 0.9 : screenSize.width * 0.6,
                    padding: EdgeInsets.symmetric(
                      vertical: config.isMobile ? 30 : 50,
                      horizontal: config.isMobile ? 20 : 50,
                    ),
                    constraints: BoxConstraints(minHeight: config.isMobile ? 400 : 570),
                    decoration: BoxDecoration(
                      image: DecorationImage(
                        image: AssetImage(
                          config.isMobile 
                            ? _getVerticalCardAsset() 
                            : widget.cardColor.path
                        ),
                        fit: BoxFit.fill,
                      ),
                    ),
                    child: Form(
                      key: _formKey,
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          // Toggles "Ajouter Parent 2" et "Même Adresse" (uniquement en mode éditable)
                          if (config.isEditable && widget.showSecondPersonToggle) 
                            _buildToggles(context, config),
                          
                          // Champs du formulaire
                          _buildFormFields(context, config),
                        ],
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
          // Chevrons de navigation
          if (!config.isMobile) ...[
            Positioned(
              top: screenSize.height / 2 - 20,
              left: 40,
              child: IconButton(
                icon: Transform(
                  alignment: Alignment.center,
                  transform: Matrix4.rotationY(math.pi),
                  child: Image.asset('assets/images/chevron_right.png', height: 40),
                ),
                onPressed: () {
                  if (context.canPop()) {
                    context.pop();
                  } else {
                    context.go(widget.previousRoute);
                  }
                },
                tooltip: 'Retour',
              ),
            ),
            Positioned(
              top: screenSize.height / 2 - 20,
              right: 40,
              child: IconButton(
                icon: Image.asset('assets/images/chevron_right.png', height: 40),
                onPressed: _handleSubmit,
                tooltip: 'Suivant',
              ),
            ),
          ],
          // Boutons mobile en bas
          if (config.isMobile)
            Positioned(
              bottom: 20,
              left: 20,
              right: 20,
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  ElevatedButton(
                    onPressed: () {
                      if (context.canPop()) {
                        context.pop();
                      } else {
                        context.go(widget.previousRoute);
                      }
                    },
                    child: const Text('Précédent'),
                  ),
                  ElevatedButton(
                    onPressed: _handleSubmit,
                    child: const Text('Suivant'),
                  ),
                ],
              ),
            ),
        ],
      ),
    );
  }

  /// Construit les toggles (Parent 2 / Même adresse)
  Widget _buildToggles(BuildContext context, DisplayConfig config) {
    if (config.isMobile) {
      // Layout vertical sur mobile
      return Column(
        children: [
          _buildSecondPersonToggle(context),
          if (widget.showSameAddressCheckbox) ...[
            const SizedBox(height: 16),
            _buildSameAddressToggle(context),
          ],
          const SizedBox(height: 32),
        ],
      );
    } else {
      // Layout horizontal sur desktop
      return Column(
        children: [
          Row(
            children: [
              Expanded(
                flex: 12,
                child: _buildSecondPersonToggle(context),
              ),
              const Expanded(flex: 1, child: SizedBox()),
              if (widget.showSameAddressCheckbox)
                Expanded(
                  flex: 12,
                  child: _buildSameAddressToggle(context),
                ),
            ],
          ),
          const SizedBox(height: 32),
        ],
      );
    }
  }

  Widget _buildSecondPersonToggle(BuildContext context) {
    return Row(
      children: [
        const Icon(Icons.person_add_alt_1, size: 20),
        const SizedBox(width: 8),
        Flexible(
          child: Text(
            'Ajouter Parent 2 ?',
            style: GoogleFonts.merienda(fontWeight: FontWeight.bold),
            overflow: TextOverflow.ellipsis,
          ),
        ),
        const Spacer(),
        Switch(
          value: _hasSecondPerson,
          onChanged: (value) {
            setState(() {
              _hasSecondPerson = value;
              _fieldsEnabled = value;
            });
          },
          activeColor: Theme.of(context).primaryColor,
        ),
      ],
    );
  }

  Widget _buildSameAddressToggle(BuildContext context) {
    return Row(
      children: [
        Icon(
          Icons.home_work_outlined,
          size: 20,
          color: _fieldsEnabled ? null : Colors.grey,
        ),
        const SizedBox(width: 8),
        Flexible(
          child: Text(
            'Même Adresse ?',
            style: GoogleFonts.merienda(
              color: _fieldsEnabled ? null : Colors.grey,
            ),
            overflow: TextOverflow.ellipsis,
          ),
        ),
        const Spacer(),
        Switch(
          value: _sameAddress,
          onChanged: _fieldsEnabled ? (value) {
            setState(() {
              _sameAddress = value ?? false;
              _updateAddressFields();
            });
          } : null,
          activeColor: Theme.of(context).primaryColor,
        ),
      ],
    );
  }

  /// Construit les champs du formulaire avec la nouvelle infrastructure
  Widget _buildFormFields(BuildContext context, DisplayConfig config) {
    return Column(
      children: [
        // Nom et Prénom
        FormFieldRow(
          config: config,
          fields: [
            _buildField(
              config: config,
              label: 'Nom',
              controller: _lastNameController,
              hint: 'Votre nom de famille',
              enabled: _fieldsEnabled,
            ),
            _buildField(
              config: config,
              label: 'Prénom',
              controller: _firstNameController,
              hint: 'Votre prénom',
              enabled: _fieldsEnabled,
            ),
          ],
        ),
        SizedBox(height: config.isMobile ? 16 : 32),
        
        // Téléphone et Email
        FormFieldRow(
          config: config,
          fields: [
            _buildField(
              config: config,
              label: 'Téléphone',
              controller: _phoneController,
              hint: 'Votre numéro de téléphone',
              keyboardType: TextInputType.phone,
              enabled: _fieldsEnabled,
            ),
            _buildField(
              config: config,
              label: 'Email',
              controller: _emailController,
              hint: 'Votre adresse e-mail',
              keyboardType: TextInputType.emailAddress,
              enabled: _fieldsEnabled,
            ),
          ],
        ),
        SizedBox(height: config.isMobile ? 16 : 32),
        
        // Adresse
        _buildField(
          config: config,
          label: 'Adresse (N° et Rue)',
          controller: _addressController,
          hint: 'Numéro et nom de votre rue',
          enabled: _fieldsEnabled && !_sameAddress,
        ),
        SizedBox(height: config.isMobile ? 16 : 32),
        
        // Code Postal et Ville
        FormFieldRow(
          config: config,
          fields: [
            Flexible(
              flex: 1,
              child: _buildField(
                config: config,
                label: 'Code Postal',
                controller: _postalCodeController,
                hint: 'Code postal',
                keyboardType: TextInputType.number,
                enabled: _fieldsEnabled && !_sameAddress,
              ),
            ),
            Flexible(
              flex: 4,
              child: _buildField(
                config: config,
                label: 'Ville',
                controller: _cityController,
                hint: 'Votre ville',
                enabled: _fieldsEnabled && !_sameAddress,
              ),
            ),
          ],
        ),
      ],
    );
  }

  /// Construit un champ individuel (éditable ou readonly)
  Widget _buildField({
    required DisplayConfig config,
    required String label,
    required TextEditingController controller,
    String? hint,
    TextInputType? keyboardType,
    bool enabled = true,
  }) {
    if (config.isReadonly) {
      // Mode readonly : utiliser FormFieldWrapper
      return FormFieldWrapper(
        config: config,
        label: label,
        value: controller.text,
      );
    } else {
      // Mode éditable : utiliser CustomAppTextField existant pour garder le style
      return CustomAppTextField(
        controller: controller,
        labelText: label,
        hintText: hint ?? label,
        style: CustomAppTextFieldStyle.beige,
        fieldWidth: double.infinity,
        labelFontSize: config.isMobile ? 18.0 : 22.0,
        inputFontSize: config.isMobile ? 16.0 : 20.0,
        keyboardType: keyboardType ?? TextInputType.text,
        enabled: enabled,
      );
    }
  }

  /// Retourne l'asset de carte vertical correspondant à la couleur
  String _getVerticalCardAsset() {
    switch (widget.cardColor) {
      case CardColorHorizontal.blue:
        return CardColorVertical.blue.path;
      case CardColorHorizontal.green:
        return CardColorVertical.green.path;
      case CardColorHorizontal.lavender:
        return CardColorVertical.lavender.path;
      case CardColorHorizontal.lime:
        return CardColorVertical.lime.path;
      case CardColorHorizontal.peach:
        return CardColorVertical.peach.path;
      case CardColorHorizontal.pink:
        return CardColorVertical.pink.path;
      case CardColorHorizontal.red:
        return CardColorVertical.red.path;
    }
  }
}